Wanted to share my regrets about doing ematrix. Went in for mild acne scarring on cheeks and chin, was really nervous about possible poor results and specifically asked about possibility of ematrix causing additional scarring or collagen loss. I was promised by 2 doctors at this practice (on Park Avenue, no less) that this was "impossible," ematrix only stimulates collagen and cannot cause additional scars. I went ahead with 3 treatments, all level C (suposedly levels A and B do nothing for scarring). First session 2/1/2012, second session 3/15/2012, third session 5/8/2012. I delayed the third treatment because after the second treatment, I thought I started seeing 2 new scars. I should not have gone for the third, but trusted my doctors. It is now 4 months out, and still have 2 additional scars, plus the old scarring has not improved at all. Finally, although I was not concerned about aging or wrinkles (I am 39), I can see that my laugh lines are now far more noticeable/pronounced than they ever were before ematrix. I went back to my doctor and he acknowledged my new scars and deeper laugh lines, but he claims they just happened and what I need is another round of ematrix and filler in my laughlines. Just awful experience all around. Feel free to post questions and I will try and check back to answer. PS -- I have to say that I notice every doctor on this site recommends ematrix (or similar laser resurfacing), yet I have not read one patient reviewer who is happy with the outcome for acne scarring from ematrix.